First off, beautiful pictures! You've got a great model here and she really makes this picture stand out. I only have a few suggestions for this image.
The coloration of the picture is the biggest distraction I see here. You've got such a stunning model with great movement through her hair from the wind. The colors need to be a bit more vivid though; they are a little dull which really takes away from the beautiful job you did everywhere else in the photo.
While you did a fantastic job with how the model is posed, I have seen many pictures similar to this before. I would suggest trying this same shot from a different angle, perhaps from the side or slightly above her. That would really make this picture stand out even more.
Overal, great job! You already have succeeded at creating a beautifully captivating image here; my critique was only to try and give you a different point of view. Keep up the great work!